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Finding the Fourth Proportional to 708.55, 1,062.73 and 214.90

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Solution

The fourth proportional to 708.55, 1,062.73 and 214.90 is: 322.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.55 : 1,062.73 = 214.90 : x
  2. Step 2: Convert to fraction form
    708.55/1,062.73 = 214.90/x
  3. Step 3: Cross multiply
    708.55x = 1,062.73 × 214.90
  4. Step 4: Simplify right side
    708.55x = 228,380.68
  5. Step 5: Solve for x
    x = 228,380.68/708.55
  6. Step 6: Final answer
    x = 322.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.